*{
	margin:0px; 		/*边距*/
	padding:0px;		/*内部距离*/
}
ul{
	list-style-type:none;    /*将所有的ul中列表前面的点去掉*/
}

#container {
	background-color:#188AE2;
	width:600px;
	height:600px;
	margin:0px auto;
	position:relative;
}/*定义总的容器宽高*/


#container #one {
	height:150px;
}
#container #two {
	border-radius:15px;
	width:300px;
	height:300px;
	margin:0px auto;
	background-color:#FFF;;
}
#container #three {
	height:150px;
}
